M49000000S datasheet(32/64 Pages) AMD

32 / 64 page

July 19, 2002

Am49DL32xBG

P R E L I M I NARY

Table 16.

Command Definitions (Flash Byte Mode)

Legend:

X = Don’t care

RA = Address of the memory location to be read.

RD = Data read from location RA during read operation.

PA = Address of the memory location to be programmed. Addresses

latch on the falling edge of the WE# or CE#f pulse, whichever happens

later.

PD = Data to be programmed at location PA. Data latches on the rising

edge of WE# or CE#f pulse, whichever happens first.

SADD = Address of the sector to be verified (in autoselect mode) or

erased. Address bits A20–A12 uniquely select any sector.

BA = Address of the bank that is being switched to autoselect mode, is

in bypass mode, or is being erased.

Notes:

See Table 1 for description of bus operations.

All values are in hexadecimal.

Except for the read cycle and the fourth cycle of the autoselect

command sequence, all bus cycles are write cycles.

Data bits DQ15–DQ8 are don’t care in command sequences,

except for RD and PD.

Unless otherwise noted, address bits A20–A12 are don’t cares.

No unlock or command cycles required when bank is in read

mode.

The Reset command is required to return to reading array data

(or to the erase-suspend-read mode if previously in Erase

Suspend) when a bank is in the autoselect mode, or if DQ5 goes

high (while the bank is providing status information).

The fourth cycle of the autoselect command sequence is a read

cycle. The system must provide the bank address to obtain the

manufacturer ID, device ID, or SecSi Sector factory protect

information. Data bits DQ15–DQ8 are don’t care. See the

Autoselect Command Sequence section for more information.

The data is 82h for factory locked and 02h for not factory locked.

10. The data is 00h for an unprotected sector/sector block and 01h

for a protected sector/sector block.

11. The Unlock Bypass command is required prior to the Unlock

Bypass Program command.

12. The Unlock Bypass Reset command is required to return to

reading array data when the bank is in the unlock bypass mode.

13. The system may read and program in non-erasing sectors, or

enter the autoselect mode, when in the Erase Suspend mode.

The Erase Suspend command is valid only during a sector erase

operation, and requires the bank address.

14. The Erase Resume command is valid only during the Erase

Suspend mode, and requires the bank address.

15. Command is valid when device is ready to read array data or when

device is in autoselect mode.

Table 17.

Autoselect Device IDs (Byte Mode)

T = Top Boot Sector, B = Bottom Boot Sector

Command

Sequence

(Note 1)

Bus Cycles (Notes 2–5)

First

Second

Third

Fourth

Fifth

Sixth

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Read (Note 6)

Reset (Note 7)

XXX

Manufacturer ID

AAA

555

(BA)

AAA

(BA) 00

Device ID

AAA

555

(BA)

AAA

(BA) 02

see

Table 17

SecSi

 Sector Factory Protect

(Note 9)

AAA

555

(BA)

AAA

(BA)

X06

82/02

Sector Protect Verify

(Note 10)

AAA

555

(BA)

AAA

(SADD)

X04

Enter SecSi Sector Region

AAA

555

AAA

Exit SecSi Sector Region

AAA

555

AAA

XXX

Program

AAA

555

AAA

Unlock Bypass

AAA

555

AAA

Unlock Bypass Program (Note 11)

XXX

Unlock Bypass Reset (Note 12)

XXX

Chip Erase

AAA

555

AAA

555

AAA

Sector Erase

AAA

555

AAA

555

SADD

Erase Suspend (Note 13)

Erase Resume (Note 14)

CFI Query (Note 15)

Device

Autoselect Device ID

Am29DL322G

55h (T), 56h (B)

Am29DL323G

50h (T), 53h (B)

Am29DL324G

5Ch (T), 5Fh (B)

M49000000S Datasheet(PDF) 32 Page - Advanced Micro Devices

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